Changes
74 Inch
,==SPUPNIC ON==
D. Carter 13 November 2015
# The next morning, check that the vacuum got down to the 10-6 mbar range.
# Shortly before mounting the instrument, while still vacuum pumping, start filling the cryostat with LN2.
# After the first flask, close the cryostat vacuum valve and stop the pump.
# Continue filling slowly until full, indicated by LN2 boiling in the outer funnel. When full, using a glove, quickly remove the inner funnel and dump the excess LN2 back in the filling flask.